package com.atguigu.process.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.atguigu.auth.service.SysUserService;
import com.atguigu.model.process.Process;
import com.atguigu.model.process.ProcessRecord;
import com.atguigu.model.process.ProcessTemplate;
import com.atguigu.model.system.SysUser;
import com.atguigu.process.mapper.OaProcessMapper;
import com.atguigu.process.service.MessageService;
import com.atguigu.process.service.OaProcessRecordService;
import com.atguigu.process.service.OaProcessService;
import com.atguigu.process.service.OaProcessTemplateService;
import com.atguigu.security.custom.LoginUserInfoHelper;
import com.atguigu.vo.process.ApprovalVo;
import com.atguigu.vo.process.ProcessFormVo;
import com.atguigu.vo.process.ProcessQueryVo;
import com.atguigu.vo.process.ProcessVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.activiti.bpmn.model.BpmnModel;
import org.activiti.bpmn.model.EndEvent;
import org.activiti.bpmn.model.FlowNode;
import org.activiti.bpmn.model.SequenceFlow;
import org.activiti.engine.HistoryService;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.history.HistoricTaskInstance;
import org.activiti.engine.history.HistoricTaskInstanceQuery;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.activiti.engine.task.TaskQuery;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipInputStream;

/**
 * <p>
 * 审批类型 服务实现类
 * </p>
 *
 * @author atguigu
 * @since 2023-03-30
 */
@Service
public class OaProcessServiceImpl extends ServiceImpl<OaProcessMapper, Process> implements OaProcessService {

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private SysUserService sysUserService;

    @Autowired
    private OaProcessTemplateService processTemplateService;

    @Autowired
    private RuntimeService runtimeService;

    @Autowired
    private TaskService taskService;

    @Autowired
    private OaProcessRecordService processRecordService;

    @Autowired
    private HistoryService historyService;

    @Autowired
    private MessageService messageService;

    @Override
    public IPage<ProcessVo> selectPage(Page<ProcessVo> pageParam, ProcessQueryVo processQueryVo) {
        IPage<ProcessVo> pageModel = baseMapper.selectPage(pageParam, processQueryVo);

        return pageModel;
    }

    @Override
    public void deployByZip(String deployPath) {
        InputStream inputStream =
                this.getClass().getClassLoader().getResourceAsStream(deployPath);
        ZipInputStream zipInputStream = new ZipInputStream(inputStream);
        //流程定义 部署
        Deployment deployment = repositoryService.createDeployment()
                .addZipInputStream(zipInputStream).deploy();
        System.out.println(deployment.getId());
        System.out.println(deployment.getName());
    }

    @Override
    public void startUp(ProcessFormVo processFormVo) {
        //1 根据当前用户id获取用户信息
        SysUser sysUser = sysUserService.getById(LoginUserInfoHelper.getUserId());
        //2 根据审批模板id把模板信息查询
        ProcessTemplate processTemplate = processTemplateService.getById(processFormVo.getProcessTemplateId());

        //3 保持提交的审批信息到业务表oa_process
        Process process = new Process();
        //复制processFormVo属性的值到process里面
        BeanUtils.copyProperties(processFormVo, process);
        //其他值
        String workNo = System.currentTimeMillis() + "";
        process.setProcessCode(workNo);
        process.setUserId(LoginUserInfoHelper.getUserId());
        process.setFormValues(processFormVo.getFormValues());
        process.setTitle(sysUser.getName() + "发起" + processTemplate.getName() + "申请");
        process.setStatus(1);
        baseMapper.insert(process);

        //4 启动流程实例 -runtimeService
        //4.1 流程定义的key
        String processDefinitionKey = processTemplate.getProcessDefinitionKey();
        //4.2 业务的key processId
        String businessKey = String.valueOf(process.getId());
        //4.3 流程的参数 form表单json数据，转换map集合
        String formValues = processFormVo.getFormValues();
        //formData
        JSONObject jsonObject = JSON.parseObject(formValues);
        JSONObject formData = jsonObject.getJSONObject("formData");
        //遍历formData得到里面的内容，封装到map里面
        Map<String, Object> map = new HashMap<>();
        for (Map.Entry<String, Object> entry : formData.entrySet()) {
            map.put(entry.getKey(), entry.getValue());
        }
        Map<String, Object> variables = new HashMap<>();
        variables.put("data", map);
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(processDefinitionKey
                                        , businessKey, variables);

        //5 查询下一个审批人 -taskService
        //审批人可能有多个，并行审批
        List<Task> taskList = this.getCurrentTaskList(processInstance.getId());
        List<String> nameList = new ArrayList<>();
        for (Task task : taskList) {
            String assigneeName = task.getAssignee();
            //根据登录名称获得真实姓名
            SysUser user = sysUserService.getUserByUserName(assigneeName);
            String name = user.getName();
            nameList.add(name);

            //TODO 6 向审批人推送消息
            //messageService.pushPendingMessage(process.getId(), user.getId(), task.getId());
        }
        process.setProcessInstanceId(processInstance.getId());
        process.setDescription("等待" + StringUtils.join(nameList.toArray(), ",") + "审批");
        //7 业务和流程关联 更新oa_process数据
        baseMapper.updateById(process);
        //记录操作审批信息的记录
        processRecordService.record(process.getId(), 1, "发起申请");
    }

    @Override
    public IPage<ProcessVo> findPending(Page<Process> pageParam) {
        //1 封装查询条件 根据当前登录用户名
        TaskQuery query = taskService.createTaskQuery()
                .taskAssignee(LoginUserInfoHelper.getUsername())
                .orderByTaskCreateTime()
                .desc();
        //2 调用分页查询，返回代办任务集合
        int begin = (int) ((pageParam.getCurrent() - 1) * pageParam.getSize());
        int end = (int) pageParam.getSize();
        long totalCount = query.count();
        List<Task> taskList = query.listPage(begin, end);

        //3 把taskList数据封装到List<ProcessVo>里面
        List<ProcessVo> processVoList = new ArrayList<>();
        for (Task task : taskList) {
            //从task获取流程实例id
            String processInstanceId = task.getProcessInstanceId();
            //根据流程实例id获取实例对象
            ProcessInstance processInstance = runtimeService.createProcessInstanceQuery()
                                                            .processInstanceId(processInstanceId)
                                                            .singleResult();
            //从流程实例中获得businessKey -> oa_process表的id
            String businessKey = processInstance.getBusinessKey();
            if (businessKey == null) {
                continue;
            }
            long processId = Long.parseLong(businessKey);
            Process process = baseMapper.selectById(processId);
            //process对象 ---> processVo对象
            ProcessVo processVo = new ProcessVo();
            BeanUtils.copyProperties(process, processVo);
            processVo.setTaskId(task.getId());
            processVoList.add(processVo);
        }
        //4 封装返回Page对象
        Page<ProcessVo> page = new Page<>(pageParam.getCurrent(), pageParam.getSize(), totalCount);
        page.setRecords(processVoList);
        return page;
    }

    @Override
    public Map<String, Object> show(Long id) {
        //1 根据流程id获取流程信息process
        Process process = baseMapper.selectById(id);

        //2 根据流程id获取流程记录信息
        LambdaQueryWrapper<ProcessRecord> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ProcessRecord::getProcessId, id);
        List<ProcessRecord> processRecordList = processRecordService.list(wrapper);

        //3 根据模板id查询模板信息
        ProcessTemplate processTemplate =
                processTemplateService.getById(process.getProcessTemplateId());

        //4 判断当前用户是否可以审批
        boolean isApprove = false;
        List<Task> taskList = this.getCurrentTaskList(process.getProcessInstanceId());
        for (Task task : taskList) {
            //判断审批人是否是当前用户
            if (task.getAssignee().equals(LoginUserInfoHelper.getUsername())) {
                isApprove = true;
                break;
            }
        }


        //5 查询数据封装到map集合返回
        Map<String, Object> map = new HashMap<>();
        map.put("process", process);
        map.put("processRecordList", processRecordList);
        map.put("processTemplate", processTemplate);
        map.put("isApprove", isApprove);
        return map;
    }

    //审批
    @Override
    public void approve(ApprovalVo approvalVo) {
        //1 从approvalVo 获取任务id, 根据任务id获取流程变量
        String taskId = approvalVo.getTaskId();
        Map<String, Object> variables = taskService.getVariables(taskId);
        for (Map.Entry<String, Object> entry : variables.entrySet()) {
            System.out.println(entry.getKey());
            System.out.println(entry.getValue());
        }

        //2 判断审批状态值 status == 1通过 -1 不通过
        if (approvalVo.getStatus() == 1) {
            Map<String, Object> variable = new HashMap<>();
            taskService.complete(taskId);
        } else {
            this.endTask(taskId);
        }

        //3 在oa_process_record 表中记录审批相关过程信息
        String description =
                approvalVo.getStatus() == 1 ? "已通过" : "驳回";
        processRecordService.record(approvalVo.getProcessId(),
                approvalVo.getStatus(), description);

        //4 查询下一个审批人，更新流程表记录 process 表记录
        Process process = baseMapper.selectById(approvalVo.getProcessId());
        //查询任务
        List<Task> taskList = this.getCurrentTaskList(process.getProcessInstanceId());
        if (!CollectionUtils.isEmpty(taskList)) {
            List<String> assignList = new ArrayList<>();
            for (Task task : taskList) {
                String assignee = task.getAssignee();
                SysUser sysUser = sysUserService.getUserByUserName(assignee);
                assignList.add(sysUser.getName());
                //TODO 公众号消息推送
            }
            process.setDescription("等待" + StringUtils.join(assignList.toArray(), ",") + "审批");
            process.setStatus(1);
        } else {
            if (approvalVo.getStatus().intValue() == 1) {
                process.setDescription("审批完成（通过）");
                process.setStatus(2);
            } else {
                process.setDescription("审批完成（驳回）");
                process.setStatus(1);
            }
        }
        baseMapper.updateById(process);

    }

    @Override
    public IPage<ProcessVo> findProcessed(Page<Process> pageParam) {
        //封装查询条件
        HistoricTaskInstanceQuery query = historyService.createHistoricTaskInstanceQuery()
                .taskAssignee(LoginUserInfoHelper.getUsername())
                .finished()
                .orderByTaskCreateTime().desc();
        //调用方法条件分页查询，返回list集合
        int begin = (int) ((pageParam.getCurrent() - 1) * pageParam.getSize());
        int size = (int)pageParam.getSize();
        List<HistoricTaskInstance> list = query.listPage(begin, size);
        long totalCount = query.count();

        //遍历list集合封装成List<ProcessVo>
        List<ProcessVo> processVoList = new ArrayList<>();
        for (HistoricTaskInstance item : list) {
            //流程实例id
            String processInstanceId = item.getProcessInstanceId();
            //根据流程实例id查询获取process信息
            LambdaQueryWrapper<Process> wrapper = new LambdaQueryWrapper<>();
            wrapper.eq(Process::getProcessInstanceId, processInstanceId);
            Process process = baseMapper.selectOne(wrapper);
            if (process == null) {
                continue;
            }
            //process -> processVo
            ProcessVo processVo = new ProcessVo();
            BeanUtils.copyProperties(process, processVo);
            //放入list
            processVoList.add(processVo);
        }
        IPage<ProcessVo> pageModel = new Page<>(pageParam.getCurrent(), pageParam.getSize(), totalCount);
        pageModel.setRecords(processVoList);
        return pageModel;
    }

    @Override
    public IPage<ProcessVo> findStarted(Page<ProcessVo> pageParam) {
        ProcessQueryVo processQueryVo = new ProcessQueryVo();
        processQueryVo.setUserId(LoginUserInfoHelper.getUserId());
        IPage<ProcessVo> pageModel = baseMapper.selectPage(pageParam, processQueryVo);
        return pageModel;
    }

    //结束流程
    private void endTask(String taskId) {
        //  当前任务
        Task task = taskService.createTaskQuery().taskId(taskId).singleResult();

        BpmnModel bpmnModel = repositoryService.getBpmnModel(task.getProcessDefinitionId());
        List endEventList = bpmnModel.getMainProcess().findFlowElementsOfType(EndEvent.class);
        // 并行任务可能为null
        if(CollectionUtils.isEmpty(endEventList)) {
            return;
        }
        FlowNode endFlowNode = (FlowNode) endEventList.get(0);
        FlowNode currentFlowNode = (FlowNode) bpmnModel.getMainProcess().getFlowElement(task.getTaskDefinitionKey());

        //  临时保存当前活动的原始方向
        List originalSequenceFlowList = new ArrayList<>();
        originalSequenceFlowList.addAll(currentFlowNode.getOutgoingFlows());
        //  清理活动方向
        currentFlowNode.getOutgoingFlows().clear();

        //  建立新方向
        SequenceFlow newSequenceFlow = new SequenceFlow();
        newSequenceFlow.setId("newSequenceFlowId");
        newSequenceFlow.setSourceFlowElement(currentFlowNode);
        newSequenceFlow.setTargetFlowElement(endFlowNode);
        List newSequenceFlowList = new ArrayList<>();
        newSequenceFlowList.add(newSequenceFlow);
        //  当前节点指向新的方向
        currentFlowNode.setOutgoingFlows(newSequenceFlowList);

        //  完成当前任务
        taskService.complete(task.getId());

    }

    //当前任务的列表
    private List<Task> getCurrentTaskList(String id) {
        List<Task> taskList = taskService.createTaskQuery()
                .processInstanceId(id)
                .list();
        return taskList;
    }
}
